Alert archive / Connecticut / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 21, NWS New York, NY

July 1, 2012Lower Connecticut River Valley Planning Region, Southeastern Connecticut Planning Region, Connecticut

NWS New York, NY issued this severe thunderstorm warning at Jul 1, 2012, 4:08 PM EDT for Lower Connecticut River Valley Planning Region, Southeastern Connecticut Planning Region, Connecticut. It was in force for 37 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 1, 2012, 4:08 PM EDT (20:08 UTC)
Expired: Jul 1, 2012, 4:45 PM EDT
In force: 37 min
Issued by: NWS New York, NY
Area: Storm-based polygon

Counties Lower Connecticut River Valley Planning Region, CT, Southeastern Connecticut Planning Region, CT

The radar

The Brookhaven radar (KOKX), 65 km from the middle of the area, began a volume at 20:10 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where
Jul 1, 4:09 PM EDT	HAIL 0.75	Ivoryton, CT
Jul 1, 4:10 PM EDT	HAIL 1.5	Westbrook, CT
Jul 1, 4:11 PM EDT	HAIL 0.75	Westbrook, CT
Jul 1, 4:15 PM EDT	HAIL 0.75	Saybrook Manor, CT

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 1, 1:35 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.1 hours before the alert went out and 65 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 254 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 1757 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 40 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

087 
WUUS51 KOKX 012008
SVROKX
CTC007-011-012045-
/O.NEW.KOKX.SV.W.0021.120701T2008Z-120701T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
408 PM EDT SUN JUL 1 2012

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MIDDLESEX COUNTY IN SOUTHERN CONNECTICUT...
  SOUTHWESTERN NEW LONDON COUNTY IN SOUTHERN CONNECTICUT...

* UNTIL 445 PM EDT...

* AT 406 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING GOLF BALL SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM CHESTER TO CLINTON...AND MOVING
  SOUTHEAST AT 30 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  WESTBROOK...NORTH LYME...OLD SAYBROOK...OLD LYME AND WATERFORD

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

THIS STORM HAS A HISTORY OF PRODUCING LARGE DAMAGING HAIL. SEEK 
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM SUNDAY
EVENING FOR SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY AND
SOUTHEAST NEW YORK.

&&

LAT...LON 4131 7209 4129 7214 4132 7219 4128 7220
      4129 7224 4125 7238 4127 7240 4127 7245
      4125 7247 4126 7249 4125 7251 4126 7254
      4128 7255 4133 7260 4151 7249 4132 7208
TIME...MOT...LOC 2008Z 302DEG 26KT 4138 7243 4128 7249

$$

MALOIT

1 follow-up statement

303 
WWUS51 KOKX 012040
SVSOKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
440 PM EDT SUN JUL 1 2012

CTC007-011-012050-
/O.EXP.KOKX.SV.W.0021.000000T0000Z-120701T2045Z/
NEW LONDON CT-MIDDLESEX CT-
440 PM EDT SUN JUL 1 2012

...THE SEVERE THUNDERSTORM WARNING FOR MIDDLESEX AND SOUTHWESTERN NEW
LONDON COUNTIES WILL EXPIRE AT 445 PM EDT...

THE SEVERE STORM IS MOVING OVER LONG ISLAND SOUND...THEREFORE THE 
WARNING IS BEING ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM SUNDAY
EVENING FOR SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY AND
SOUTHEAST NEW YORK.

LAT...LON 4131 7209 4129 7214 4132 7219 4128 7220
      4129 7224 4125 7238 4127 7240 4127 7245
      4125 7247 4126 7249 4125 7251 4126 7254
      4128 7255 4133 7260 4151 7249 4132 7208
TIME...MOT...LOC 2040Z 302DEG 26KT 4126 7217 4116 7223

$$

MALOIT

The office that day

Everything else NWS New York, NY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 1, 1:42 PM EDT	Special Weather Statement	OKX		63 min
Jul 1, 2:54 PM EDT	Special Weather Statement	OKX		51 min
Jul 1, 2:55 PM EDT	Special Weather Statement	OKX		35 min
Jul 1, 3:01 PM EDT	Severe Thunderstorm Warning	OKX	Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region	44 min
Jul 1, 3:25 PM EDT	Severe Thunderstorm Warning	OKX	Southeastern Connecticut Planning Region	50 min
Jul 1, 3:36 PM EDT	Severe Thunderstorm Warning	OKX	Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region	39 min
Jul 1, 4:17 PM EDT	Special Weather Statement	OKX		28 min
Jul 1, 4:28 PM EDT	Severe Thunderstorm Warning	OKX	Southeastern Connecticut Planning Region	17 min
Jul 1, 5:25 PM EDT	Severe Thunderstorm Warning	OKX	Naugatuck Valley Planning Region	24 min
Jul 1, 5:27 PM EDT	Severe Thunderstorm Warning	OKX	Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region	48 min
Jul 1, 5:51 PM EDT	Special Weather Statement	OKX		24 min
Jul 1, 6:01 PM EDT	Special Weather Statement	OKX		29 min
Jul 1, 6:04 PM EDT	Severe Thunderstorm Warning	OKX	Southeastern Connecticut Planning Region	41 min
Jul 1, 6:16 PM EDT	Severe Thunderstorm Warning	OKX	Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region	44 min
Jul 1, 6:23 PM EDT	Areal Flood Advisory	OKX	Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region	52 min
Jul 1, 7:03 PM EDT	Special Weather Statement	OKX		42 min

Nearby

Severe Thunderstorm Warnings in Connecticut, 2012 Every severe thunderstorm warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.